<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<style>
#a {
  width: 200px;
  height: 200px;
  background-color: rgb(0,255,0);
}
#b {
  width: 100px;
  height: 100px;
  background: linear-gradient(rgb(0,255,255), rgb(255,255,0));
}
</style>
<div id="a">
<div id="b">
</div>
</div>
</html>
